Pagelines temprarly halts WP3.4.1 after image upload in section

Hi, got a problem here
When I upload an image in a section, either boxes or quick slider. The front end stops working and displays an empty page. The admin menu dosent display boxes and sections dont show up when editing pages.
When i go to Pagelines default settings page (or disable and then enable Pageline) everything starts to work again until next time I do am image upload in a section.
Flushing cache and cookies don't work.
Also the sites behaves very slow, and speeds up if I disable Pagelines.
I had no problem on my development server. This is a fresh 3.4.1 install with everything default except Pageline is installed, no other plugins enabled except Sections plugin. No other plugins installed except the defaults.
How can i error check?